CPUMASK_OFFSTACK must be set to have NR_CPUS_RANGE_END value greater than 512, which eventually allows NR_CPUS > 512. CPUMASK_OFFSTACK can also be enabled by setting MAXSMP=y, but that will set NR_CPUS=8192. This is not accurate for Hyper-V, because maximum number of vCPU supported by Hyper-V today is 2048. Thus, enabling MAXSMP increase the vmlinux size unnecessary. This option allows NR_CPUS=2048 which saves around 1MB of vmlinux size for Hyper-V. Signed-off-by: Saurabh Sengar <ssengar@xxxxxxxxxxxxxxxxxxx> --- drivers/hv/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig index 0024210..bc3f496 100644 --- a/drivers/hv/Kconfig +++ b/drivers/hv/Kconfig @@ -9,6 +9,7 @@ config HYPERV select PARAVIRT select X86_HV_CALLBACK_VECTOR if X86 select OF_EARLY_FLATTREE if OF + select CPUMASK_OFFSTACK help Select this option to run Linux as a Hyper-V client operating system. -- 1.8.3.1
